Hand pain, lump near elbow. Taken Oflox for typhoid. What to do?

hi Doctor, my daughter 12 years old had typhoid 15 days back she was admitted to hospital and as on IV Oflox , zentrax for 5 days the took these medicines in form of tablets orally for 10 days. she sjoide her school after 10 days back and has to write a lot. she is having pain in her hand and a lump kind can be felt near het elbow of right hand where she had IV for3 days. pls suggest what to do